function createObjectURL(object) {
	return (window.URL) ? window.URL.createObjectURL(object) : window.webkitURL.createObjectURL(object);
}
var xhr = new XMLHttpRequest();
var formData = new FormData();
xhr.open('get', 'url'); //url填写后台的接口地址，如果是post，在formData append参数（参考原文地址）
xhr.setRequestHeader("access-token", sessionStorage.getItem('access-token'));
xhr.responseType = 'blob';
xhr.onload = function(e) {
	if (this.status == 200) {
		var blob = this.response;
		var filename = "设备导出.xls";
		console.log(this.response)
		if (window.navigator.msSaveOrOpenBlob) {
			navigator.msSaveBlob(blob, filename);
		} else {
			var a = document.createElement('a');
			var url = createObjectURL(blob);
			a.href = url;
			a.download = filename;
			document.body.appendChild(a);
			a.click();
			window.URL.revokeObjectURL(url);
		}

	}
};
xhr.send(formData);
